Used as a photolabile protecting group in organic synthesis, particularly in the controlled release of carboxylic acids and alcohols upon exposure to light. Its coumarin-derived core enables efficient cleavage under mild UV irradiation, making it valuable in solid-phase synthesis, peptide chemistry, and drug delivery systems where temporal and spatial control of molecular release is required. Commonly applied in the design of caged compounds for biological studies and in phototriggered prodrug activation.